<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<!-- th:fragment 定义用于加载的块 -->
<span th:fragment="test">
    it is test！
</span>
</body>
</html>